CA493067A - Bois de soutenement - Google Patents

Bois de soutenement

Info

Publication number
CA493067A
CA493067A CA493067A CA493067DA CA493067A CA 493067 A CA493067 A CA 493067A CA 493067 A CA493067 A CA 493067A CA 493067D A CA493067D A CA 493067DA CA 493067 A CA493067 A CA 493067A
Authority
CA
Canada
Prior art keywords
pit props
props
pit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA493067A
Other languages
English (en)
Inventor
Sylvester Dora
Mary Sylvester Eva
H. Sylvester Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA493067A publication Critical patent/CA493067A/fr
Expired legal-status Critical Current

Links

CA493067A Bois de soutenement Expired CA493067A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA493067T

Publications (1)

Publication Number Publication Date
CA493067A true CA493067A (fr) 1953-05-26

Family

ID=35638451

Family Applications (1)

Application Number Title Priority Date Filing Date
CA493067A Expired CA493067A (fr) Bois de soutenement

Country Status (1)

Country Link
CA (1) CA493067A (fr)

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